If we remember our Middle School science class...
Plain old air is 78% nitrogen to start with.
Kerby
"D. Mallinson" <dmall@mwonline.net> wrote: What Ron said..... it is a waste for
street cars, or even track day
cars. A pro driver in a pro race circuit maybe. Otherwise, use plain
old air.
Don Mallinson
Ron Porter wrote:
>Besides the marketing angle to make a few $$$, the only possible benefit are
>for clueless folks who never check their tire air (I can think of a few
>family members as I write this). They have a better chance of keeping a
>consistent tire pressure over the 6-12 months before the tires get checked
>again (most likely at oil change time).
>
>For the rest of us who check tires more regularly, it's a waste.
>
>Planes and race tires are the useful applications for it that I can see.
>
>Ron Porter
>
>I know we talked about this on the list a while back.
>
>
>http://news.yahoo.com/s/ap/20060731/ap_on_bi_ge/nitrogen_tires
>
>"Skeptics will question how much can be gained by filling tires with pure
>nitrogen when the air we breathe is 78 percent nitrogen."
>
>
>Being a skeptic (and an engineer) I will and do question this. Correct me
>if I'm wrong, but when a tire is mounted on a rim, doesn't "regular air" get
>trapped inside???? Even if pure Nitrogen is used to "pop" the tire bead
>onto the rim there's still "regular air" inside that will be mixed with the
>Nitrogen. Soooo, you don't end up with a tire filled with 100% Nitrogen.
>The only way to ensure 100% Nitrogen inside the tire is if the tire mounting
>machine were inside a sealed room filled with Nitrogen and the installer had
>to wear an Oxygen mask. Is that what the tire dealer purchases for $3,000
>to $12,000 dollars? What am I missing here?
>
>What if it's Sunday night and my tire(s) are a few psi low? If the local
>Gas 'n Sip doesn't have Nitrogen, then what good is having Nitrogen in my
>tires?
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